9491

• UCREFRP Catalog Number: 9491
• Author: Snyder, D. E.
• Title: Electrofishing and Its Harmful Effects on Fish.
• USFW Year: 2003.
• USFW - Doc Type: Denver.
• Copyright Material: NO

14 INFORMATION AND TECHNOLOGY REpORT--2003-0002

1000

(")
E
t)
~ 100
~
"0
c::
ro

10

Power density
____ 0 = 100IJW/cm3

'"
E
It)
<
~

E
~

0.1
0.0001

0.001

0.01

0.1 1 10
Water conductivity, c, IJS/cm

100

1000

10000

1000
(")
E 900
t)
~ 800
~ 700
"0
lij 600
",- 500
5 400
<
~ 300
E- 200
~ 100
o
0.0001

0= EJ = CE2= J2/c
J = cE

- Voltage gradient
E, V/cm

Current density -
J, lJA/cm2

J = 0.1

Power density
____ 0 = 100IJW/cm3

250

500

750

1000

E = 0.1
...... E - 1
100 1000 10000
400
300
'"
E
200 t)
<
~
100
0
1250 1500

J = 1 .....
0.001 0.01

0.1 1 10

Water conductivity, e, /-IS/em

3.5
3.0
2.5
E 2.0
~ 1.5
1.0
0.5
0
10

Power density, 0 = 100 iJW/cm3

Voltage gradient
/ E, V/cm

Water conductivity, c, /-IS/em

Fig. 7. Changes in voltage gradient and current density relative to water conductivity at a constant power density of
100 j.1W/cm3. (Top and middle graphs are the same except the Y-axis is logarithmic in the top graph and arithmetic in the
middle graph. Bottom graph is limited to the range of conductivities typical of fresh waters and bounded by dotted
vertical lines in the upper graphs; both axes are arithmetic with different Y-axis scales for voltage gradient and current
density.)